11. The process of claim 10 further comprising: applying the combined
parts of the coating composition onto a substrate; and, exposing the
coating composition to sufficient moisture to provide for curing of the
one-part, moisture-curable, elastomeric, translucent coating composition
into a cured coating onto the substrate.

12. A substrate containing the cured coating made by the process of claim
11.

13. The substrate of claim 12 wherein the coating has a modulus at 50%
elongation per ASTM D-412 of from about 40 psi to about 150 psi.

14. The substrate of claim 12 wherein the coating has a Shore A durometer
value per ASTM C-661 of from about 10 to about 40.

15. The substrate of claim 12 wherein the coating has a translucency
which is greater than that of coating of an identical substrate coated
with an identical coating composition wherein di-hydroxy-terminated
dimethylpolysiloxane polymer (a) has a viscosity of greater than 200,000
cps.

16. The substrate of claim 12 wherein the coating has one or more of a
durability or UV resistance which is greater than that of coating of an
identical substrate coated with an identical coating composition wherein
di-hydroxy-terminated dimethylpolysiloxane polymer (a) has a viscosity of
greater than 200,000 cps.

17. The substrate of claim 12 wherein the coating provides water proofing
protection for a longer period of time than that of coating of an
identical substrate coated with an identical coating composition wherein
di-hydroxy-terminated dimethylpolysiloxane polymer (a) has a viscosity of
greater than 200,000 cps.

18. The substrate of claim 12 wherein the coating maintains the original
appearance of the substrate more so than that of an identical substrate
coated with an identical coating composition wherein
di-hydroxy-terminated dimethylpolysiloxane polymer (a) has a viscosity of
greater than 200,000 cps.

19. A method of treating a building facade comprising applying to an
exterior portion of the building facade the one-part, moisture-curable,
elastomeric, translucent coating composition of claim 1 and curing the
coating composition to provide a cured coating on the building facade.

[0002] The present invention relates to elastomeric translucent waterproof
coatings for the construction industry. The present invention also
relates to a process of making elastomeric translucent waterproof
coatings. There are also provided substrates coated with the elastomeric
translucent waterproof coatings.

BACKGROUND OF THE INVENTION

[0003] Waterproof coatings are used in the construction industry to
provide for weather and waterproofing protection of exterior building
facades. Some waterproof coatings are pigmented-opaque calcium carbonate
filled compositions that change the color/appearance of the facade of
buildings when applied. Other waterproof coatings can decrease the
pigmentation of the facade of buildings compared to calcium carbonate
filled coatings, but these other coatings, which are largely acrylic and
polyurethane based coatings, lack the necessary long-term durability and
UV resistance of the filled coatings.

[0004] Thus, there exists a demand for a translucent waterproof coating
that has the long-term durability and UV resistance of calcium carbonate
filled waterproof coatings.

[0020] The present invention is further described in the detailed
description section provided below.

BRIEF DESCRIPTION OF THE FIGURES

[0021]FIG. 1 shows a series of different substrates coated with the
composition according to the present invention.

[0022] FIG. 2 shows a brick wall coated with the composition according to
the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0023] It has been unexpectedly discovered by the inventors herein that
silicone-based coating compositions containing low-viscosity silicone
parts can provide for elastomeric and translucent waterproof coatings
that do not alter the appearance of substrates, e.g., building facades,
to which they are applied but do provide long-term durability, UV
resistance and resistance to wind and extreme temperatures (e.g., below
40 degrees Fahrenheit and above 85 degrees Fahrenheit)

[0024] In the specification and claims herein, the following terms and
expressions are to be understood as indicated.

[0025] As used in the specification and including the appended claims, the
singular forms "a," "an," and "the" include the plural, and reference to
a particular numerical value includes at least that particular value,
unless the context clearly dictates otherwise.

[0026] Ranges expressed herein as from "about" or "approximately" one
particular value and/or to "about" or "approximately" another particular
value. When such a range is expressed, another embodiment includes from
the one particular value and/or to the other particular value. Similarly,
when values are expressed as approximations, by use of the antecedent
"about," it will be understood that the particular value forms another
embodiment.

[0027] All methods described herein may be performed in any suitable order
unless otherwise indicated herein or otherwise clearly contradicted by
context. The use of any and all examples, or exemplary language (e.g.,
"such as") provided herein, is intended merely to better illuminate the
invention and does not pose a limitation on the scope of the invention
unless otherwise claimed. No language in the specification should be
construed as indicating any non-claimed element as essential to the
practice of the invention.

[0028] As used herein, "comprising," "including," "containing,"
"characterized by," and grammatical equivalents thereof are inclusive or
open-ended terms that do not exclude additional, unrecited elements or
method steps, but will also be understood to include the more restrictive
terms "consisting of" and "consisting essentially of."

[0029] Other than in the working examples or where otherwise indicated,
all numbers expressing amounts of materials, reaction conditions, time
durations, quantified properties of materials, and so forth, stated in
the specification and claims are to be understood as being modified in
all instances by the term "about."

[0030] It will be understood that any numerical range recited herein
includes all sub-ranges within that range and any combination of the
various endpoints of such ranges or sub-ranges.

[0031] It will be further understood that any compound, material or
substance which is expressly or implicitly disclosed in the specification
and/or recited in a claim as belonging to a group of structurally,
compositionally and/or functionally related compounds, materials or
substances includes individual representatives of the group and all
combinations thereof.

[0032] The expression "aliphatic hydrocarbon" means any hydrocarbon group
from which one or more hydrogen atoms has been removed and is inclusive
of alkyl, alkenyl, alkynyl, cyclic alkyl, cyclic alkenyl, cyclic alkynyl,
aryl, aralkyl and arenyl and may contain heteroatoms.

[0033] The term "alkyl" means any monovalent, saturated straight, branched
or cyclic hydrocarbon group; the term "alkenyl" means any monovalent
straight, branched, or cyclic hydrocarbon group containing one or more
carbon-carbon double bonds where the site of attachment of the group can
be either at a carbon-carbon double bond or elsewhere therein; and, the
term "alkynyl" means any monovalent straight, branched, or cyclic
hydrocarbon group containing one or more carbon-carbon triple bonds and,
optionally, one or more carbon-carbon double bonds, where the site of
attachment of the group can be either at a carbon-carbon triple bond, a
carbon-carbon double bond or elsewhere therein. Examples of alkyls
include methyl, ethyl, propyl and isobutyl. Examples of alkenyls include
vinyl, propenyl, allyl, methallyl, ethylidenyl norbornane, ethylidene
norbornyl, ethylidenyl norbornene and ethylidene norbornenyl. Examples of
alkynyls include acetylenyl, propargyl and methylacetylenyl.

[0035] The term "aryl" means any monovalent aromatic hydrocarbon group;
the term "aralkyl" means any alkyl group (as defined herein) in which one
or more hydrogen atoms have been substituted by the same number of like
and/or different aryl (as defined herein) groups; and, the term "arenyl"
means any aryl group (as defined herein) in which one or more hydrogen
atoms have been substituted by the same number of like and/or different
alkyl groups (as defined herein). Examples of aryls include phenyl and
naphthalenyl. Examples of aralkyls include benzyl and phenethyl. Examples
of arenyls include tolyl and xylyl.

[0036] It will be understood herein that all measures of viscosity are
obtained at 25 degrees Celsius unless noted otherwise.

[0037] Reference is made to substances, parts, or ingredients in existence
at the time just before first contacted, formed in situ, blended, or
mixed with one or more other substances, parts, or ingredients in
accordance with the present disclosure. A substance, part or ingredient
identified as a reaction product, resulting mixture, or the like may gain
an identity, property, or character through a chemical reaction or
transformation during the course of contacting, in situ formation,
blending, or mixing operation if conducted in accordance with this
disclosure with the application of common sense and the ordinary skill of
one in the relevant art (e.g., chemist). The transformation of chemical
reactants or starting materials to chemical products or final materials
is a continually evolving process, independent of the speed at which it
occurs. Accordingly, as such a transformative process is in progress
there may be a mix of starting and final materials, as well as
intermediate species that may be, depending on their kinetic lifetime,
easy or difficult to detect with current analytical techniques known to
those of ordinary skill in the art.

[0038] In one non-limiting embodiment herein the di-hydroxy-terminated
dimethylpolysiloxane polymer (a) may have the formula:

MDaM

with the subscript a equal to or greater than 1, specifically from 1 to
about 3000, more specifically from 1 to about 2000 and most specifically
from 1 to about 1000 where

M=(HO)(CH3)2SiO.sub.1/2; and,

D=(CH3)2SiO2/2.

[0039] In one non-limiting embodiment herein the di-hydroxy-terminated
dimethylpolysiloxane polymer (a) may have a viscosity of less than about
200,000 cps, specifically less than about 100,000 cps, more specifically
less than about 50,000 cps and most specifically less than about 5,000
cps wherein each of said ranges having a lower endpoint of greater than
zero, such as 1 cps or 5 cps. In one non-limiting embodiment herein the
di-hydroxy-terminated dimethylpolysiloxane polymer (a) may be a mixture
of di-hydroxy-terminated dimethylpolysiloxane polymers each having a
different viscosity. For example, the di-hydroxy-terminated
dimethylpolysiloxane polymer part (a) may comprises one or more lower
viscosity di-hydroxy-terminated dimethylpolysiloxane polymers having a
viscosity of from about 1 cps or 5 cps up to about 750 cps, preferably
from about 50 cps up to about 600 cps, wherein such a
di-hydroxy-terminated dimethylpolysiloxane polymer is in admixture with
one or more higher viscosity di-hydroxy-terminated dimethylpolysiloxane
polymers having a viscosity of from about 1,000 cps to about 5,000 cps,
preferably from about 2,000 cps to about 4,000 cps.

[0040] The level of incorporation of the di-hydroxy-terminated
dimethylpolysiloxane polymer (a) ranges from slightly above 0 weight % to
about 80% weight %, more preferably from about 20% weight % to about 70%
weight %, and most preferably from about 40% weight % to about 60% weight
% of the total one-part, moisture-curable, elastomeric, translucent
coating composition.

[0041] The one-part, moisture-curable, elastomeric translucent coating
composition of the present invention may also comprise a reinforcing
filler (b). The reinforcing filler (b) useful in the present invention is
a filler or mixture of fillers that is selected from those known to be
useful in silicone compositions, provided they do not significantly
impair the translucency of the coating, i.e., that a substrate coated
maintains its original appearance following application of the coating
thereof.

[0042] The fillers (b) include ground, precipitated and colloidal calcium
carbonates which are treated with compounds such as stearate or stearic
acid; reinforcing silicas such as fumed silicas, precipitated silicas,
silica gels and hydrophobized silicas and silica gels; crushed and ground
quartz, alumina, aluminum hydroxide, titanium hydroxide, diatomaceous
earth, iron oxide, carbon black and graphite or clays such as kaolin,
bentonite or montmorillonite for example.

[0043] Preferably, the filler (b) is silica filler, such as a silica
filler doubly treated with D4 and hexamethyldisilazane. The type of
filler will determine the amount of filler that is included in the
one-part, moisture-curable, elastomeric, translucent coating composition
of the present invention. The amount of filler useful in the present
invention is generally from about 2 weight % to about 20 weight %, more
preferably from about 5 weight % to about 15 weight %, and most
preferably from about 8 weight % to about 12 weight % of the total
one-part, moisture-curable, elastomeric, translucent coating composition.
The filler may be a single species or a mixture of two or more species.

[0044] The one-part, moisture-curable, elastomeric, translucent coating
composition of the present invention may also comprise an organic solvent
(c) such as for example, a linear aliphatic hydrocarbon solvent. One
example of organic solvent (c) can be C12-C14 aliphatic hydrocarbon
fluid.

[0045] The level of incorporation of organic solvent (c) ranges from about
0 weight % to about 60 weight %, more preferably from about 5 weight % to
about 50 weight %, and most preferably from about 20 weight % to about 40
weight % of the one-part, moisture-curable, elastomeric, translucent
coating composition.

[0046] The one-part, moisture-curable, elastomeric, translucent coating
composition of the present invention may also comprise a VOC exempt
dialkyl cyclic siloxane. Examples of cyclic siloxane solvents can be for
example hexamethylcyclotetrasiloxane or octamethylcyclopentasiloxane.

[0047] The level of incorporation of VOC exempt dialkylcyclosiloxanes
ranges from about 0 weight % to about 60 weight %, more preferably from
about 5 weight % to about 50 weight %, and most preferably from about 20
weight % to about 40 weight of the one-part, moisture-curable,
elastomeric, translucent coating composition.

[0048] The one-part, moisture-curable, elastomeric, translucent coating
composition of the present invention may also comprise polyalkoxysilane
crosslinking agent (d) which generally has the formula:

(R1O)xR2ySi

where R1 and R2, are independently chosen monovalent C1 to C60
hydrocarbon radicals, such as methyl, ethyl, propyl, isopropyl, butyl,
tert-butyl, sec-butyl and the like, and where x is 2, 3, or 4 and y is
zero, one or two, provided that x+y=4. One specific example of the
polyalkoxysilane crosslinking agent (d) is methyltrimethoxysilane.

[0049] The level of incorporation of the polyalkoxysilane crosslinking
agent (d) ranges from about 0.5 weight % to about 10 weight %, more
preferably from about 1 weight % to about 5 weight %, and most preferably
from about 1.5 weight % to about 3 weight % of the total one-part,
moisture-curable, elastomeric, translucent coating composition.

[0051] The level of incorporation of the organo-silane adhesion promoter
(e) ranges from about 0.1 weight % to about 5.0 weight %, more preferably
from about 0.5 weight % to about 4.0 weight %, and most preferably from
about 1.0 weight % to about 2.0 weight % of the total one-part,
moisture-curable, elastomeric, translucent coating composition.

[0052] The one-part, moisture-curable, elastomeric, translucent coating
composition of the present invention also comprises a titanium
condensation cure catalyst (f). The titanium condensation cure catalyst
(f) can be any titanium condensation cure catalyst known to be useful for
facilitating crosslinking in silicone compositions. In one embodiment,
chelated titanium compounds, for example, 1,3-propanedioxytitanium
bis(ethylacetoacetate); di-isopropoxytitanium bis(ethylacetoacetate); and
tetra-alkyl titanates, for example, tetra n-butyl titanate and
tetra-isopropyl titanate, can be used as the titanium condensation cure
catalyst (f).

[0053] The level of incorporation of the titanium condensation cure
catalyst (f), ranges from about 0.1 weight % to about 5.0 weight %, more
preferably from about 0.5 weight % to about 4.0 weight %, and most
preferably from about 1.0 weight % to about 3.0 weight % of the total
one-part, moisture-curable, elastomeric, translucent coating composition.

[0054] It will be understood herein that the term "one-part" in the
expression one-part, moisture-curable, elastomeric, translucent coating
composition means that all of the parts (a)-(f) are in contact with each
other and have not been separated in any fashion.

[0055] It will be understood herein that the term "moisture-curable" in
the expression one-part, moisture-curable, elastomeric, translucent
coating composition means that the composition can achieve at least some
level of cure following exposure to at least atmospheric moisture. In one
embodiment, the one-part, moisture-curable, elastomeric, translucent
coating composition can cure to a non-tacky state in a period of from
about 5 minutes to about 8 hours, specifically from about 10 minutes to
about 4 hours and most specifically from about 15 minutes to about 2
hours at a temperature of 25 degrees Celsius when exposed to atmospheric
moisture.

[0056] In one embodiment herein it will be understood that the one-part,
moisture-curable, elastomeric, translucent coating composition can
self-bond to a substrate when applied thereto, i.e., the coating
composition does not require any additional presence of a bonding layer
or bonding material or other chemical or physical means of attachment for
proper coating of the substrate.

[0057] The process of forming the one-part, moisture-curable, elastomeric,
translucent coating composition herein can comprise combining the parts
(a)-(f). Such a combination can take place piece-meal over time or
simultaneously.

[0059] In the broadest conception of the present invention, all the
ingredients may be mixed in the continuous compounding extruder. In such
a process, which is continuous, the extruder is operated at a range of
from about 50 degrees C. to about 100 degrees C., but more preferably in
the range of from about 60 degrees C. to about 80 degrees C., and even
more preferably, the extruder is operated at a partial vacuum so as to
remove any volatiles during the mixing process.

[0060] The compositions herein can be formulated as clear, translucent
compositions. The term clear or transparent according to the present
invention is intended to connote that a translucent coating of the
present invention allows ready viewing of the substrate on which it is
coated. By contrast, an opaque composition renders it impossible to
clearly view a substrate which has been coated with the opaque
composition, and significantly impairs the appearance of the substrate
following the coating thereof. Thus, according to the present invention,
there are differences between transparent (clear) and opaque
compositions. These differences can be noted by the naked eye in the
manner indicated herein and as is known to those skilled in the art.

[0061] The compositions herein can be formulated as elastomeric
compositions. The term elastomeric according to the present invention is
understood to mean that the composition when applied to a substrate can
provide for effective UV, weather and water protection without excessive
hardening of the coating over time which can result in visible pitting,
cracking and flaking of the coating from the substrate. Such elastomeric
properties of the coating can be appreciated by those skilled in the art
by visible inspection of the coating. In one embodiment, the elastomeric
advantages of the coating composition can be provided when the coating
provides the herein described levels of modulus and elongation, as well
as the levels of stability and UV resistance described herein.

[0062] The process of forming the one-part, moisture-curable, elastomeric,
translucent coating composition herein can further comprise applying the
combined parts of the coating composition (a)-(f) onto a substrate.

[0063] In one embodiment herein the substrate can comprise any material
that may be on the face of a building or structure that is sought to be
waterproofed and/or weather protected, such as concrete, brick, wood,
metal, glass, plastic, stone, mortar, painted substrates, and the like.

[0064] In another embodiment the amount of coating applied to a substrate
can depend on several factors such as the type of substrate, the
temperature, the humidity, the desired degree of waterproofing, and the
specific parts of the one-part, moisture-curable, elastomeric,
translucent coating composition. In one embodiment, the amount of coating
is from about 10 to about 0.1 millimeters, preferably from about 5 to
about 0.5 millimeters and most preferably from about 2 to about 0.2
millimeters.

[0065] The one-part, moisture-curable, elastomeric translucent coating
compositions herein can be applied by any means commonly known and used
by those skilled in the art, such as for example, rolling or spraying.

[0066] The process of forming the one-part, moisture-curable, elastomeric,
translucent coating composition herein can even further comprise exposing
the coating composition to sufficient moisture to provide for curing of
the one-part, moisture-curable, elastomeric, translucent coating
composition into a cured coating onto the substrate.

[0067] Sufficient moisture can comprise at least atmospheric moisture and
can extend to any level of moisture necessary to achieve a level of cure
of the one-part, moisture-curable, elastomeric, translucent coating
composition to a non-tacky state as noted in the above-described periods
of time. Exposing the coating composition to sufficient moisture can be
conducted in any manner that is commonly used in the coating of
substrates as would be known by those skilled in the art.

[0068] In one embodiment there is provided a substrate containing a cured
coating made by the process described herein.

[0069] In one embodiment herein the coating on the substrate herein can
have a modulus at 50% elongation per ASTM D-412 of from about 40 psi to
about 150 psi.

[0070] In one other embodiment herein the coating on the substrate herein
can have a Shore A durometer value per ASTM C-661 of from about 10 to
about 40.

[0071] In one other embodiment herein the coating on the substrate herein
can have a lap shear adhesion value per ASTM C-961 of from about 40 psi
to about 140 psi.

[0072] In yet another embodiment herein the coating on the substrate can
have a translucency, which is greater than that of coating of an
identical substrate, coated with an identical coating composition wherein
di-hydroxy-terminated dimethylpolysiloxane polymer (a) has a viscosity of
greater than 200,000 cps.

[0073] In yet another embodiment herein the coating on the substrate can
have a one or more of a durability or UV resistance, which is greater
than that of coating of an identical substrate, coated with an identical
coating composition wherein di-hydroxy-terminated dimethylpolysiloxane
polymer (a) has a viscosity of greater than 200,000 cps. In one
embodiment the coating on the substrate has a UV resistance of at least 6
months, specifically at least 9 months, more specifically at least one
year, most specifically at least 5 years. UV resistance is understood to
be that the coated substrate does not suffer from visible cracking,
pitting, or peeling of the applied coating.

[0074] In yet another embodiment herein the coating on the substrate can
provide water proofing protection for a longer period of time than that
of coating of an identical substrate coated with an identical coating
composition wherein di-hydroxy-terminated dimethylpolysiloxane polymer
(a) has a viscosity of greater than 200,000 cps. Water proofing
protection can comprise water impermeability. In one embodiment, the
period of time can be such as that described for UV resistance.

[0075] In yet another embodiment herein the coating on the substrate can
maintains the original appearance of the substrate more so than that of
an identical substrate coated with an identical coating composition
wherein di-hydroxy-terminated dimethylpolysiloxane polymer (a) has a
viscosity of greater than 200,000 cps.

[0076] In another embodiment herein the one-part, moisture-curable,
elastomeric, translucent coating composition can have an improved shelf
stability over identical compositions which do not employ the
di-hydroxy-terminated dimethylpolysiloxane polymer (a) having a viscosity
of greater than 200,000 cps described herein. In one non-limiting
embodiment the one-part, moisture-curable, elastomeric, translucent
coating composition can have a shelf stability of at least one month,
specifically at least 3 months and more specifically at least six months
at a temperature of 50 degrees Celsius.

[0077] In one embodiment herein, the one-part, moisture-curable,
elastomeric, translucent coating compositions herein can provide the
substrate protection against extreme temperatures. An extreme temperature
as described herein can be below 40 degrees Fahrenheit, and more
specifically below 20 degrees Fahrenheit. In another embodiment herein an
extreme temperature as described herein can be above 80 degrees
Fahrenheit, specifically above 90 degrees Fahrenheit. The one-part,
moisture-curable, elastomeric, translucent coating compositions herein
can provide such extreme temperature protection for periods such as those
described herein for the UV resistance.

[0078] The one-part, moisture-curable, elastomeric, translucent coating
compositions herein can be used as coating materials for buildings,
specifically, building facades where waterproofing and/or weather
protection of the coated material can be used to protect and maintain the
original appearance of the building facade.

[0079] In one non-limiting embodiment herein, the one-part,
moisture-curable, elastomeric, translucent coating composition can be in
the absence of water. In yet another embodiment, the composition can be
in the absence of any and all minor amounts of water that is used in
compositions outside the scope of the invention herein.

[0080] In one further embodiment herein there is provided an emulsion that
contains the one-part, moisture-curable, elastomeric, translucent coating
composition described herein. Specifically, this emulsion is a
non-aqueous silicone emulsion.

[0081] The emulsification of the one-part, moisture-curable, elastomeric,
translucent coating composition into a form that can be suitable to apply
to the substrate as described herein, can be those which are known in the
art, and specifically wherein the noted mixers, blenders or shakers are
located in a continuous or batch production line and/or within a larger
industrial apparatus.

[0082] Further details of methods of emulsification are well known in the
art and shall not be detailed herein.

[0083] In one embodiment the one-part, moisture-curable, elastomeric,
translucent coating composition is clear or translucent following mixing
of the contents of the composition. The mixed composition or emulsion
containing the composition can have the noted shelf stability and other
noted properties herein and can be in the absence of water as discussed
herein.

[0084] In another embodiment herein there is also provided a method of
treating a building facade comprising applying to an exterior portion of
the building facade the one-part, moisture-curable, elastomeric,
translucent coating composition described herein and curing the coating
composition to provide a cured coating on the building facade.

[0085] There is also provided a building facade containing the cured
coating described herein.

EXAMPLES

[0086] The example below is provided for the purpose of illustrating the
present invention. All parts and/or percentages in the examples are parts
by weight (pbw). A continuous compounding extruder was utilized in the
manufacture of the one-part moisture curable, elastomeric, translucent
coatings. The continuous compounding extruder was a 30 mm Coperion
(formerly Werner-Pfleiderer) Twin-Screw extruder. The resulting one-part,
moisture curable, silicone coating compositions exhibited shelf-stable,
fast curing, self-bonding characteristics with translucent/clear
appearance once applied to the substrate. The silicone coating
composition was tested for stability by measuring the viscosity of the
compositions before, during, and after a 6-month storage period at 50
degrees Celsius. The compositions were packaged in a sealed aluminum can
and placed in a 50 degree Celsius oven. Viscosities were measured at
1-month intervals. The compositions were also tested for modulus at 50%
elongation per ASTM D-412, Durometer per ASTM C-661, tensile adhesion per
ASTM C-1135 and lap shear adhesion per ASTM C-961. All adhesion testing
was done on an Instron Model 4465 testing machine.

[0087] In example 1, there was continuously fed into barrel 1 of the
extruder, 30 pbw of a 3000 cps PDMS polymer available from MPM, 23.5 pbw
of a 500 cps PDMS polymer available from MPM, and 10 pbw of a D4 and
hexamethyldisilazane treated fumed silica filler. Into barrel 6 of the
extruder there was continuously fed 15 pbw of a C12-C14 aliphatic
hydrocarbon fluid available from Penreco Inc and 15 pbw of a D5
VOC-exempt siloxane fluid available from MPM.

[0089] The processing temperature of the extruder was maintained at 50
degrees Celsius and the production rate was 40 lb/hr. A de-airing vacuum
(25 inches Hg) was applied at barrel 10 of the extruder. The finished
composition was packaged into polyethylene cartridges and allowed to
equilibrate for 4 days at room temperature prior to testing. Testing
results are summarized in the following table:

[0091] The composition of example 1 was spray applied to brick and
aluminum substrates and put on outdoor exposure in Florida. After 9
months exposure there is no change in appearance of the coating as shown
in FIG. 1.

[0092] Cured 1/8 thick sheets of experiment 1 were placed in an Atlas 2000
QUV weatherometer and a Shore A durometer reading was measured on the
sheets every 500 hours for a total of 6,000 hours of weatherometer
exposure time. Results are shown below:

[0094] The composition of example 1 was roll-coated on a brick mock-up
facade

[0095] to give the desired "new brick" appearance and to provide long term
weatherproofing as shown in FIG. 2.

[0096] While the invention has been described with reference to a
preferable embodiment, those skilled in the art will understand that
various changes may be made and equivalents may be substituted for
elements thereof without departing from the scope of the invention. It is
intended that the invention not be limited to the particular embodiment
disclosed as the best mode for carrying out this invention, but that the
invention will include all embodiments falling within the scope of the
appended claims. All citations referred herein are expressly incorporated
herein by reference.

Patent applications by Momentive Performance Materials Inc.

Patent applications in class Containing two or more solid polymers; solid polymer or SICP and a SICP, SPFI, or an ethylenic reactant or product thereof

Patent applications in all subclasses Containing two or more solid polymers; solid polymer or SICP and a SICP, SPFI, or an ethylenic reactant or product thereof